No one called for any sort of apology from him.

He left behind a note of apology for his family.

She would have to think of an apology for that.

Didn't offer any kind of an apology for not waiting.

"You could have spent longer and thought of a real apology."

She moved back just a little, then gave a smile of apology.

There was nothing human in her words, not a note of apology.

In fact, she wrote me a very nice letter of apology.

What followed it here took the form of an apology.

He considered leaving a note of apology, then decided against it.